US6099071A - Hollow frame member of aluminum alloy for vehicle body frame - Google Patents

Hollow frame member of aluminum alloy for vehicle body frame Download PDF

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Publication number
US6099071A
US6099071A US09/145,413 US14541398A US6099071A US 6099071 A US6099071 A US 6099071A US 14541398 A US14541398 A US 14541398A US 6099071 A US6099071 A US 6099071A
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US
United States
Prior art keywords
frame member
vehicle body
body frame
hollow
hollow frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/145,413
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English (en)
Inventor
Tatsuo Kasuga
Hideaki Takaishi
Masayoshi Okamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP23682697A external-priority patent/JP3333719B2/ja
Priority claimed from JP23682797A external-priority patent/JP3333720B2/ja
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Assigned to HONDA GIKEN KOGYO KABUSHIKI KAISHA reassignment HONDA GIKEN KOGYO KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKAMOTO, MASAYOSHI, TAKAISHI, HIDEAKI, KASUGA, TATSUO
Application granted granted Critical
Publication of US6099071A publication Critical patent/US6099071A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames

Definitions

  • the present invention relates to a hollow frame member of an aluminum alloy for a vehicle body frame, and particularly, to such a hollow frame member of an aluminum alloy having a collision energy absorbing ability.
  • Vehicle body frames that are formed by various hollow frame members made of an aluminum alloy and coupling members from the demand of a reduction in weight of an automobile are known.
  • the vehicle body frame is provided, for example, with hollow frame members of an aluminum alloy, which are disposed at left and right side portions of a front portion of a vehicle body so as to extend longitudinally of the body and to exhibit a collision energy absorbing ability by crushing thereof.
  • the hollow frame member be crushed stably from its tip end upon collision of the vehicle, that a peak load on the hollow frame member be small, that a constant load be generated with a small amplitude of load after generation of the peak load, and that a surface receiving a collision load be wide enough to reliably receive the collision load.
  • the conventional hollow frame member is formed to have a large thickness over its entire length as well as a constant cross sectional area, because the aluminum alloy is low in durability from the viewpoint of its characteristic. For this reason, the conventional hollow frame member suffers from the following problems: the crushability thereof is unstable upon collision of the vehicle, and the peak load is relatively large. Moreover, the amplitude of the load after generation of the peak load is large, and a constant load cannot be generated. Further, the surface receiving the collision load is narrow. Therefore, in the vehicle body frame formed using the conventional hollow frame members, it is extremely difficult to sufficiently enhance the collision energy absorbing efficiency.
  • a collision load is applied to a front end of the hollow frame member due to a frontal collision of a vehicle, a bending deformation is produced at a substantially lengthwise central portion of the hollow frame member so as to increase the bending degree of the frame member in order to absorb such collision load.
  • a relatively large elongation is produced on an outer peripheral surface portion outside the bent portion, and the breaking of the outer peripheral surface portion occurs, because an aluminum alloy is small in elongation from the viewpoint of its characteristic. Such breaking must be avoided to the utmost, because it reduces the collision energy absorbing efficiency remarkably.
  • a hollow frame member of an aluminum alloy for a vehicle body frame which constitutes a portion of the vehicle body frame and has a collision energy absorbing ability
  • the hollow frame member has an annular end surface at one end thereof as a collision load receiving surface, and has a cross sectional area which is gradually increased from the other end thereof toward the receiving surface, and a thickness which is gradually decreased from the other end toward the receiving surface.
  • the cross sectional area refers to an area of the entire section surrounded by the profile of the hollow frame member existing in a plane perpendicular to the axis of the frame member, when the hollow frame member is cut in such plane.
  • the hollow frame member is crushed stably from a tip end thereof upon collision of the vehicle, and a peak load on the hollow frame member is smaller. Further, a constant load is generated with a small amplitude of load after generation of the peak load. Moreover, the hollow frame member is formed in a divergent shape and has the wide receiving surface and hence, can reliably receive the collision load. With such hollow frame member, it is possible to sufficiently enhance the collision energy absorbing efficiency.
  • a hollow frame member of an aluminum alloy for a vehicle body frame which is formed by bending an extruded pipe of an aluminum alloy into a bow shape to form a kick-up portion of the vehicle body frame, the extruded pipe comprising a band upper wall, a band lower wall opposed to the upper wall, and a pair of sidewalls which connect opposite side edges of the upper wall with opposite side edges of the lower wall, respectively, and which assume a V-shape in cross section.
  • FIG. 1 is a perspective view of an essential portion of a vehicle body frame according to a first embodiment
  • FIG. 2 is a perspective view of a first example of a hollow side frame member
  • FIG. 3 is an enlarged sectional view taken along a line 3--3 in FIG. 2;
  • FIG. 4 is a perspective view of an essential portion, showing a relationship between a tubular element made by extrusion and the first example of the hollow side frame member;
  • FIG. 5 is a graph showing a relationship between the time and the load
  • FIG. 6 is a perspective view of an essential portion, showing a relationship between the tubular element made by the extrusion and a second example of the hollow side frame member;
  • FIG. 7A is an illustration showing a direction of application of a force to the second example of the hollow side frame member or the like;
  • FIG. 7B is an illustration showing the compression and deformation of the second example of the hollow side frame member
  • FIG. 8 is a perspective view of an essential portion, showing a relationship between the tubular element made by the extrusion and a third example of the hollow side frame member;
  • FIG. 9 is a perspective view of an essential portion of another example of a vehicle body frame.
  • FIG. 10 is a perspective view of a fourth example of the hollow side frame member.
  • FIG. 11 is a cross-sectional view of a fifth example of the hollow side frame member.
  • a vehicle body frame 1 for an automobile is assembled using various frame members made of an aluminum alloy and a coupling member.
  • a pair of kick-up portions 3 exist at a front portion of the vehicle body frame 1 to keep away from an axle 2 for left and right front wheels.
  • Each of the kick-up portions 3 includes a hollow side frame member 5 as a bow-shaped hollow frame member fixed at its rear end to a floor member 4 and extending forwards, and a front cross member 6 which supports a front end of the hollow side frame member 5.
  • the single front cross member 6 is used commonly for the left and right kick-up portions 3.
  • Each of the hollow side frame members 5 is formed from an aluminum alloy as best shown in FIGS. 2 and 3 and has a collision energy absorbing ability. More specifically, the hollow side frame member 5 is comprised of a front pipe portion 7 which is of a divergent shape, located at a lengthwise front portion of the vehicle body and which has a circular cross section, and a rear pipe portion 8 which is connected to a rear end of the front pipe portion 7, namely, a base end thereof and which has a circular cross section and a uniform diameter over the entire length thereof.
  • the front pipe portion 7 includes an annular end surface serving as a collision load receiving surface 9 at one end, namely, a front end thereof.
  • the cross sectional area s is gradually increased from the other end, namely, the base end toward the receiving surface 9, and the thickness t is gradually decreased from the base end toward the receiving surface 9.
  • the thickness of the rear pipe portion 8 is equal to the thickness of the base end of the front pipe portion 7 over the entire length thereof.
  • the cross sectional area s in the front pipe portion 7 refers to an area of the entire portion surrounded by the profile o of the front pipe portion 7 existing in a plane p perpendicular to an axis a of the front pipe portion 7, when the front pipe portion 7 is cut in the plane p.
  • an extruded pipe 10 of an aluminum alloy having a circular cross section, which is similar to the rear pipe portion 8 as shown in FIG. 4, is produced. Then, the extruded pipe 10 is subjected to an expanding treatment over a predetermined length range to form a front pipe portion 7, and then bent into a bow shape.
  • the front pipe portion 7 is crushed stably from its tip end upon collision of the vehicle, and in a time-load curve shown in FIG. 5, the peak load on the front pipe portion 7 is decreased. Further, a constant load is generated with a smaller amplitude of load after generation of the peak load. Moreover, the front pipe portion 7 is formed into a divergent shape and the receiving surface 9 is wider and hence, can reliably receive the collision load. With the hollow side frame member 5 having such front pipe portion 7, it is possible to sufficiently enhance the collision energy absorbing efficiency.
  • a hollow side frame member 5 1 made of an aluminum alloy is comprised of the front pipe portion 7 which is of a divergent shape, located at lengthwise front portion of a vehicle body and has a hexagonal cross section, and the rear pipe portion 8 which has a hexagonal cross section, connected to a base end of the front pipe portion 7 and has a constant cross sectional area over the entire length thereof.
  • the same procedure as that described above is carried out using an extruded pipe 10 1 similar to the rear pipe portion 8 and having a hexagonal cross section.
  • the hollow side frame member 5 1 includes a band-shaped upper wall 11, a band-shaped lower wall 12 opposed to the upper wall 11, and a pair of sidewalls 13 which connect opposite side edges of the upper wall 11 and opposite side edges of the lower wall 12, respectively and which assume a V-shape in cross section.
  • the front pipe portion 7 Upon collision of the vehicle, the front pipe portion 7 is stably crushed from its tip end, in the same manner as that described above. If a force F pushing up the lower wall 12 toward the upper wall 11 due to a compressing force applied to the lower wall 12 as shown in FIG. 7A is generated at a substantially lengthwise central portion of the hollow side frame member 5 1 , namely, at a substantially top point T (as shown in FIG.
  • a hollow side frame member 5 2 made of an aluminum alloy is comprised of the front pipe portion 7 which is of a divergent shape, located at a lengthwise front portion of a vehicle body and has a rectangular cross section, and the rear pipe portion 8 which is connected to a base end of the front pipe portion 7, and which has a rectangular cross section and a constant cross-sectional area over the entire length thereof.
  • the same procedure as that described above is carried out using an extruded pipe 10 2 similar to the rear pipe portion 8 and having a rectangular cross section.
  • a vehicle body frame 1 for an automobile is assembled using various frame members made of an aluminum alloy and a coupling member.
  • a pair of kick-up portions 3 exist at a front portion of the vehicle body frame 1 to keep away from an axle 2 for left and right front wheels.
  • Each of the kick-up portion 3 includes a hollow side frame member 5 3 fixed at its rear end to a floor member 4 and extending forwards, and a front cross member 6 which supports a front end of the hollow side frame member 5 3 .
  • the single front cross member 6 is used commonly for the left and right kick-up portions 3.
  • Each of the hollow side frame members 5 3 is formed by bending an extruded pipe 10 1 of an aluminum alloy having a hexagonal cross section into a bow shape, as best shown in FIG. 10. Therefore, the hollow side frame member 5 3 is comprised of a band-shaped upper wall 11, a band-shaped lower wall 12 opposed to the upper wall 11, and a pair of sidewalls 13 which connect opposite side edges of the upper wall 11 and opposite side edges of the lower wall 12, respectively and which assume a V-shape in cross section.
  • an extruded pipe and thus a hollow side frame member 5 4 may be formed to assume a hand drum shape, or an hourglass shape, in cross section.
  • the hollow side frame member 5 4 is designed so that the collision of the bent portions 14 is not produced, while the bent portions 14 of both the sidewalls 13 are being compressed and deformed so that the bent angle ⁇ is decreased.
  • Each of the hollow side frame members 5, 5 1 to 5 4 can be also applied to a kick-up portion for the rear wheels.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)
US09/145,413 1997-09-02 1998-09-01 Hollow frame member of aluminum alloy for vehicle body frame Expired - Fee Related US6099071A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP9-236827 1997-09-02
JP23682697A JP3333719B2 (ja) 1997-09-02 1997-09-02 車体フレーム構造
JP23682797A JP3333720B2 (ja) 1997-09-02 1997-09-02 車体フレーム用Ａｌ合金製中空フレーム部材
JP9-236826 1997-09-02

Publications (1)

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US6099071A true US6099071A (en) 2000-08-08

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US09/145,413 Expired - Fee Related US6099071A (en) 1997-09-02 1998-09-01 Hollow frame member of aluminum alloy for vehicle body frame

Country Status (4)

Country Link
US (1) US6099071A (fr)
EP (2) EP1398247B1 (fr)
CN (1) CN1095772C (fr)
DE (2) DE69840368D1 (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170906B1 (en) * 1998-01-22 2001-01-09 Honda Giken Kogyo Kabushiki Kaisha Framework structure of an automobile body
US6267436B1 (en) * 1998-07-22 2001-07-31 Toyota Jidosha Kabushiki Kaisha Impact energy absorbing structure in upper vehicle body portion, and impact energy absorbing component
US6328377B1 (en) * 1999-09-08 2001-12-11 Nissan Motor Co., Ltd. Intermediate joint of side member for automotive vehicle
US6406088B1 (en) * 1998-11-26 2002-06-18 Lotus Cars Limited Crash rail for a vehicle
US20030042763A1 (en) * 2001-09-04 2003-03-06 Honda Giken Kogyo Kabushiki Kaisha Vehicle body frame hollow member
US20030090127A1 (en) * 2001-11-13 2003-05-15 Nissan Motor Co., Ltd. Front body structure for vehicle
US6598933B2 (en) * 2001-08-01 2003-07-29 Honda Giken Kogyo Kabushiki Kaisha Vehicle front body structure
US20030184124A1 (en) * 2002-04-02 2003-10-02 Nissan Motor Co., Ltd. Front vehicle frame structure
WO2005014372A1 (fr) * 2003-08-06 2005-02-17 Dofasco Tubular Products Inc. Chassis de vehicules possedant un systeme de gestion d'energie et procede de fabrication de ce chassis
US6880881B1 (en) * 2002-02-27 2005-04-19 Daimlerchrysler Ag Support structure of a motor vehicle
US20050189788A1 (en) * 2004-02-27 2005-09-01 Cornell Troy M. Energy absorbing front frame structure for a vehicle
US20060219462A1 (en) * 2003-01-09 2006-10-05 Gerd Martin Forward frame part for a utility vehicle
US7267394B1 (en) * 2004-06-03 2007-09-11 Ford Global Technologies, Llc Front end tubular structure for unitized body vehicles
CN100381324C (zh) * 2003-08-26 2008-04-16 本田技研工业株式会社 车身前部结构
US7380830B2 (en) * 2005-02-03 2008-06-03 Honda Motor Co., Ltd. Vehicle front body structure
US20080164684A1 (en) * 2007-01-10 2008-07-10 Honda Motor Co., Ltd. Light alloy extruded frame
US20080238146A1 (en) * 2007-03-30 2008-10-02 Ford Global Technologies, Llc Front rail having controlled thickness for energy absorption
US7762622B2 (en) 2006-11-06 2010-07-27 Ford Global Technologies, Llc Structural member for a motor vehicle
EP2311713A1 (fr) 2009-10-14 2011-04-20 Audi AG Longeron d'un véhicule automobile
DE102012205528A1 (de) 2011-04-05 2012-10-11 Ford Global Technologies, Llc Fahrzeugdachtragsäule
US20140326351A1 (en) * 2013-05-01 2014-11-06 Tesla Motors, Inc. Extrusion piece with dissimilar ends
US9403498B2 (en) 2013-03-20 2016-08-02 Shiloh Industries, Inc. Energy absorbing assembly for vehicle
CN106005012A (zh) * 2016-07-06 2016-10-12 郑州宇通客车股份有限公司 一种汽车及其车架
US9637175B2 (en) 2015-08-13 2017-05-02 Ford Global Technologies, Llc Extruded vehicle body component
US20180304938A1 (en) * 2017-04-20 2018-10-25 Benteler Automobiltechnik Gmbh Tubular component with an extruded profile

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CN101348130B (zh) * 2008-03-18 2010-06-23 中山大学 一种承载式新型结构电动汽车车架
CN101767530A (zh) * 2010-03-04 2010-07-07 孔繁忠 汽车辅助散热装置
CN103359174A (zh) * 2012-03-31 2013-10-23 湖南晟通科技集团有限公司 一种铝合金全承载式车身
ITBO20120271A1 (it) * 2012-05-16 2013-11-17 Ferrari Spa Puntone collassabile a deformazione controllata per il telaio di un veicolo stradale
CN103723196B (zh) * 2013-12-31 2016-03-16 勾长虹 用于载重货车的车架
JP6100191B2 (ja) * 2014-03-26 2017-03-22 豊田鉄工株式会社 車両用構造部材の製造方法
CN106143626B (zh) * 2016-07-29 2019-02-12 奇瑞新能源汽车技术有限公司 电动汽车前部下方车身结构
US20230242055A1 (en) * 2022-02-03 2023-08-03 Lordstown EV Corporation Energy absorber structure for vehicle skateboard

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US4560198A (en) * 1983-04-13 1985-12-24 Honda Giken Kogyo Kabushiki Kaisha Car body of a motorcar
US5011201A (en) * 1987-07-10 1991-04-30 Mazda Motor Corporation Front structure of vehicle body
US5540016A (en) * 1990-01-09 1996-07-30 Norsk Hydro A.S. Structural beam
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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170906B1 (en) * 1998-01-22 2001-01-09 Honda Giken Kogyo Kabushiki Kaisha Framework structure of an automobile body
US6267436B1 (en) * 1998-07-22 2001-07-31 Toyota Jidosha Kabushiki Kaisha Impact energy absorbing structure in upper vehicle body portion, and impact energy absorbing component
US6554350B2 (en) 1998-07-22 2003-04-29 Toyota Jidosha Kabushiki Kaisha Impact energy absorbing structure in upper vehicle body portion, and impact energy absorbing component
US6406088B1 (en) * 1998-11-26 2002-06-18 Lotus Cars Limited Crash rail for a vehicle
US6328377B1 (en) * 1999-09-08 2001-12-11 Nissan Motor Co., Ltd. Intermediate joint of side member for automotive vehicle
US6598933B2 (en) * 2001-08-01 2003-07-29 Honda Giken Kogyo Kabushiki Kaisha Vehicle front body structure
US6672654B2 (en) * 2001-09-04 2004-01-06 Honda Giken Kogyo Kabushiki Kaisha Vehicle body frame hollow member
US20030042763A1 (en) * 2001-09-04 2003-03-06 Honda Giken Kogyo Kabushiki Kaisha Vehicle body frame hollow member
US20030090127A1 (en) * 2001-11-13 2003-05-15 Nissan Motor Co., Ltd. Front body structure for vehicle
US6893078B2 (en) * 2001-11-13 2005-05-17 Nissan Motor Co., Ltd. Front body structure for vehicle
US6880881B1 (en) * 2002-02-27 2005-04-19 Daimlerchrysler Ag Support structure of a motor vehicle
US20030184124A1 (en) * 2002-04-02 2003-10-02 Nissan Motor Co., Ltd. Front vehicle frame structure
US6808229B2 (en) * 2002-04-02 2004-10-26 Nissan Motor Co., Ltd. Front vehicle frame structure
US20060219462A1 (en) * 2003-01-09 2006-10-05 Gerd Martin Forward frame part for a utility vehicle
US20080007088A1 (en) * 2003-08-06 2008-01-10 Copperweld Canada Inc. Vehicle Frame Having Energy Management System And Method For Making Same
WO2005014372A1 (fr) * 2003-08-06 2005-02-17 Dofasco Tubular Products Inc. Chassis de vehicules possedant un systeme de gestion d'energie et procede de fabrication de ce chassis
CN100381324C (zh) * 2003-08-26 2008-04-16 本田技研工业株式会社 车身前部结构
US6938948B1 (en) 2004-02-27 2005-09-06 Daimlerchrysler Corporation Energy absorbing front frame structure for a vehicle
US20050189788A1 (en) * 2004-02-27 2005-09-01 Cornell Troy M. Energy absorbing front frame structure for a vehicle
US7267394B1 (en) * 2004-06-03 2007-09-11 Ford Global Technologies, Llc Front end tubular structure for unitized body vehicles
US7380830B2 (en) * 2005-02-03 2008-06-03 Honda Motor Co., Ltd. Vehicle front body structure
US7762622B2 (en) 2006-11-06 2010-07-27 Ford Global Technologies, Llc Structural member for a motor vehicle
US20100231004A1 (en) * 2006-11-06 2010-09-16 Ford Global Technologies, Llc Structural Member for a Motor Vehicle
US9221498B2 (en) 2006-11-06 2015-12-29 Ford Global Technologies, Llc Structural member for a motor vehicle
US20080164684A1 (en) * 2007-01-10 2008-07-10 Honda Motor Co., Ltd. Light alloy extruded frame
US7614658B2 (en) * 2007-01-10 2009-11-10 Honda Motor Co., Ltd. Light alloy extruded frame
US20080238146A1 (en) * 2007-03-30 2008-10-02 Ford Global Technologies, Llc Front rail having controlled thickness for energy absorption
US7695052B2 (en) 2007-03-30 2010-04-13 Ford Global Technologies, Llc Front rail having controlled thickness for energy absorption
EP2311713A1 (fr) 2009-10-14 2011-04-20 Audi AG Longeron d'un véhicule automobile
DE102009049312B3 (de) * 2009-10-14 2011-06-16 Audi Ag Längsträger eines Fahrzeugkarosserieaufbaus
DE102012205528A1 (de) 2011-04-05 2012-10-11 Ford Global Technologies, Llc Fahrzeugdachtragsäule
US9403498B2 (en) 2013-03-20 2016-08-02 Shiloh Industries, Inc. Energy absorbing assembly for vehicle
US20140326351A1 (en) * 2013-05-01 2014-11-06 Tesla Motors, Inc. Extrusion piece with dissimilar ends
US9409218B2 (en) * 2013-05-01 2016-08-09 Tesla Motors, Inc. Extrusion piece with dissimilar ends
US9637175B2 (en) 2015-08-13 2017-05-02 Ford Global Technologies, Llc Extruded vehicle body component
CN106005012A (zh) * 2016-07-06 2016-10-12 郑州宇通客车股份有限公司 一种汽车及其车架
US20180304938A1 (en) * 2017-04-20 2018-10-25 Benteler Automobiltechnik Gmbh Tubular component with an extruded profile

Also Published As

Publication number Publication date
EP1398247A2 (fr) 2004-03-17
EP1398247A3 (fr) 2007-04-04
DE69840368D1 (de) 2009-01-29
EP0900717A3 (fr) 2001-01-31
DE69827720T2 (de) 2005-03-31
CN1210084A (zh) 1999-03-10
EP0900717B1 (fr) 2004-11-24
EP0900717A2 (fr) 1999-03-10
CN1095772C (zh) 2002-12-11
DE69827720D1 (de) 2004-12-30
EP1398247B1 (fr) 2008-12-17

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